Cheapest return flights from St. Louis to Toronto in October from 213€

AirHint found the following cheapest return flights from St. Louis (STL) to Toronto (YYZ) in October 2025 (see full year).

Return flights

30 Oct - 06 Nov Spirit Airlines
15 Oct - 19 Oct Frontier Airlines
02 Oct - 08 Oct Spirit Airlines
03 Oct - 07 Oct Southern Airways Express
07 Oct - 13 Oct Frontier Airlines
03 Oct - 06 Oct Southern Airways Express
30 Oct - 06 Nov Air Canada direct
13 Oct - 15 Oct Frontier Airlines
13 Oct - 15 Oct Air Canada direct
04 Oct - 08 Oct Frontier Airlines
10 Oct - 13 Oct Delta
07 Oct - 13 Oct Air Canada direct

Also check the deals for one-way flights from St. Louis to Toronto in October.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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